JP2004036020A - Seamed felt for making paper and method for producing the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a seamed felt comprising a base fabric having a structure in which a woven fabric layer having connection loops disposed therein is laminated to a woven layer woven in an endless state independently of the woven fabric, which can avoid troubles such as the halfway breaking of wefts to project from a paper-making surface and the fraying of the wefts at places near to the cut ends of warps. <P>SOLUTION: A weft-free region free from wefts 11 interlaced with only the warps 10 of the loop-free woven layer is formed in a portion laterally cut along the row of the connection loops 3,4 in an endlessly woven loop-free woven fabric layer 6. Further, wefts 14 are disposed which are interlaced with the warps 7 of the loop-having woven fabric layer 5 at places near to the connection loops in the loop-having woven fabric layer 5 and are also interlaced with the warps of the loop-free woven layer on both the sides of the weft-free region in the loop-free woven layer. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a felt with a paper-making seam that is joined endlessly by joining joining loops provided at both ends of an ended felt, and through which a core wire is joined endlessly, and a method of manufacturing the same, and particularly, a joining loop row is provided. The present invention relates to a paper-made seamed felt having a base fabric having a structure in which a woven fabric layer is laid on a woven fabric layer which is independently endlessly woven, and a method for producing the same.
[0002]
[Prior art]
In the papermaking felt used in the wet paper pressing process, one of the requirements is that a required thickness corresponding to the papermaking conditions is required under compression, and the void volume is particularly increased in order to secure high water squeezing. A base fabric having a structure devised to be large may be employed. Further, in order to improve the workability of inserting into a paper machine, a so-called seam felt is known in which an end felt is drawn into a felt run and both ends are joined to each other to be endless. It is desired to form a seam even in felt having a large cloth volume.
[0003]
However, in order to increase the void volume of the base fabric, in addition to weaving the base fabric with a triple weave or quadruple weave, two or three or more single weave, double weave, or triple weave fabrics are stacked. There is a method of creating a cloth, and when seaming is to be performed with a base cloth having such an overlapped structure, it is woven endlessly in a woven fabric layer with a loop provided with a joining loop row and a woven fabric structure independent of this. A configuration in which a loop-free woven fabric layer is overlapped is considered. In this case, after forming a nonwoven fiber layer by needling on both superimposed fabric layers, an endless fabric layer is formed along with the joining loop in the width direction along with the nonwoven fiber layer in order to finish it with an endless shape. Be cut off.
[0004]
[Problems to be solved by the invention]
However, in the cutting operation for finishing into the above-mentioned end shape, not only the warp of the endless fabric layer but also the weft yarn is cut obliquely in the middle, and the cut weft yarn in the middle penetrates the non-woven fiber layer to form a paper. It may protrude from the forming surface, and in such a case, it is difficult to form an appropriate wet paper web. In addition, when the endless woven fabric layer is cut by the cutting operation, the weft near the cut end of the warp may be unraveled due to various external forces acting on the felt during use. There is an inconvenience that a large operation loss occurs due to the breakage of the wet paper.
[0005]
The present invention has been devised to solve such a problem of the prior art, and its main purpose is to cut a weft yarn in the middle during a cutting operation for finishing to an end shape. It is an object of the present invention to provide a paper-made seamed felt and a method for manufacturing the felt, which are configured to avoid inconvenience of protruding from a paper forming surface or breaking a weft near a cut end of a warp.
[0006]
[Means for Solving the Problems]
In order to achieve such an object, according to the present invention, as described in claim 1, the configuration of the felt with a seam for papermaking is changed to a woven layer with a loop provided with a joining loop independently of an endless shape. A base fabric having a structure in which loop-free woven fabric layers laid on each other are overlapped, and the loop-free woven fabric layer is cut in a width direction along a row of the joining loops when the felt is finished to an end shape, In this cut portion, a non-weft region having no weft entangled only with the warp of the woven layer without loop was formed. According to this, the loop-free woven fabric layer is cut in the non-weft region, so that the weft is not cut obliquely in the middle, and the inconvenience that the weft protrudes from the paper forming surface and hinders smooth operation is avoided. it can.
[0007]
In the paper-made felt with a seam, as shown in claim 2, at the same time as being entangled with the warp of the looped fabric layer in the vicinity of the joining loop in the looped fabric layer, at both sides of the non-weft region in the loop-free fabric layer. A configuration having wefts entangled with the warps of the loop-free woven fabric layer can be adopted. According to this, in order to control the weft of the non-loop woven fabric layer close to the non-weft area and suppress the deviation, even under severe conditions of repeated compression and tension change before and after press by the press mechanism of the running paper machine, It is possible to prevent the weft from being released from the cut end of the warp. Furthermore, the woven fabric layer with loops and the woven fabric layer without loops are temporarily fixed, and the non-weft area and the joining loop row are kept aligned until the needling process where both woven fabric layers are integrated, improving workability. Can be done.
[0008]
In the felt with a seam for papermaking, as shown in claim 3, in the vicinity of the non-weft region of the non-looped fabric layer, the wefts entangled only with the warp of the non-looped fabric layer similarly constitute the non-looped fabric layer. It is possible to adopt a configuration in which the formation fibers of the non-woven fiber layer are better entangled than the weft of the ground portion to be formed. In addition, in the vicinity of the joining loop in the looped fabric layer, the wefts entangled only with the warp of the looped fabric layer are similarly formed fibers of the nonwoven fiber layer from the wefts of the ground portion constituting the looped fabric layer. It is possible to take a configuration formed of a thread with good entanglement. According to this, since the bonding force between the two fabric layers via the nonwoven fiber layer is increased, the risk of the two fabric layers separating during use can be reduced, and the vicinity of the joining loop can be reduced. Of the non-woven fiber layer at the same time can be suppressed. The yarn having a better entanglement of the non-woven fiber layer than the weft in the ground portion is a multifilament yarn in which long fibers are twisted, a twisted yarn in which monofilaments are twisted, a spun yarn in which short fibers are spun, and a base fabric. A twisted yarn obtained by twisting a melted yarn that melts and adheres to a warp in a heat forming process and an appropriate yarn such as a monofilament, and a yarn with a fluff in which a large number of short fibers are densely arranged around a core yarn around the core yarn. Yarns or twisted yarns obtained by twisting them are preferred.
[0009]
In the felt with a seam for papermaking, as described in claim 5, a configuration having a plurality of nonwoven fabric layers can be adopted. According to this, a base cloth having a larger void volume can be produced.
[0010]
Further, in the present invention, as described in claim 6, a step of weaving the woven fabric layer with a loop endlessly while forming a joining loop by entanglement of a driving yarn with a core material for forming a loop, and weft yarn over a required length Endlessly weaving the non-loop woven layer so that a non-weft area without loops is formed, and overlapping the woven layer with the loop and the woven layer without the loop so that the weft area corresponds to the joining loop to form the base fabric. Manufacturing, laminating and integrating the non-woven fiber layer on the base fabric, extracting the core material for forming the loop, cutting the non-woven fiber layer and the loop-free woven layer along the row of the joining loop, and terminating the end. And a step of finishing the shape. According to this, the loop-free woven fabric layer is cut in the non-weft region, so that the weft is not cut obliquely in the middle, and the inconvenience that the weft protrudes from the paper forming surface and hinders smooth operation is avoided. it can.
[0011]
In addition to this, similarly to a generally known manufacturing process, a process of performing a heat treatment on the base fabric before integrating the nonwoven fabric fiber layer by needling, and various processes after needling, for example, washing. There are several processes, such as a process, a process of applying a chemical process, a process of applying a press process, a process of applying a heat treatment, a process of baking a felt surface, a process of cutting to an appropriate product width, and a process of melting a cut surface. The product is manufactured through the process. In the heat treatment step for the base fabric, the heat treatment may be performed separately before the two fabric layers are superimposed, or the heat treatment may be performed after the two fabric layers are superposed. In some cases, the streaks may bend, and in order to avoid this, it is good to perform heat treatment after temporarily fixing both fabric layers with wefts that are entangled with both of the fabric layers. Since the deviation from the non-weft region can be suppressed, the advantage that the non-weft region can be set narrower can be obtained.
[0012]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, the configuration of the present invention will be described in detail with reference to the accompanying drawings.
[0013]
FIG. 1 is a longitudinal sectional view showing a first embodiment of a felt with paper seam according to the present invention. The felt with seam is obtained by laminating and integrating a nonwoven fiber layer 2 on a base fabric 1. The base fabric 1 is formed by adding a non-loop fabric layer 6 to a looped fabric layer 5 provided with joining loops 3 and 4. Is provided. The woven fabric layer 5 with a loop has a double woven structure in which a weft 9 is entangled with two warp yarns 7 and 8 arranged in a thickness direction, and the woven fabric layer 6 without a loop is a single warp yarn. 10 has a single woven structure in which the weft 11 is entangled.
[0014]
The non-looped fabric layer 6 is arranged on the paper forming surface 12 side, and has a higher number of threads than the looped fabric layer 5, that is, is densely woven with small-diameter filaments, and is effective for improving the smoothness of paper. However, an appropriate structure is adopted according to various performances required for the felt.
[0015]
The non-loop fabric layer 6 is woven endlessly, is needled together with the looped fabric layer 5 and then cut in the width direction along the rows of the joining loops 3 and 4. The cut portion includes a loop-free fabric layer. A non-weft region having no weft 11 entangled only with the warp 10 of No. 6 is formed in advance. The non-weft region may be formed by extracting the weft yarn 11 after weaving of the loop-free woven fabric layer 6. However, the weft-free region is formed at the time of weaving in order to avoid damage to the warp yarn 10 and to reduce labor. It is preferable to weave it.
[0016]
The base fabric 1 is entangled with one warp 7 of the looped woven fabric layer 5 in the vicinity of the joining loops 3 and 4 in the looped woven fabric layer 5 and at the same time on both sides of the weft-free region of the loopless woven fabric layer 6. A weft thread 14 entangled with the warp yarn 10 of the non-looped fabric layer 6 is provided, thereby connecting the looped fabric layer 5 and the non-looped fabric layer 6 to suppress the displacement of the two fabric layers 5 and 6 and reduce the number of loops. The weft 11 in the woven fabric layer 6 which is close to the non-weft region is regulated to prevent the weft 11 from slipping toward the joining loops 3 and 4 to prevent the weft 11 from falling off due to external force during traveling. Further, in the fabric layer 5 with a loop, a weft 15 is provided on the side of the joining loop 3.4 of the weft 14 connecting the fabric layers 5 and 6, whereby the weft 14 connecting the fabric layers 5 and 6 is formed. By restricting the displacement to the joining loops 3 and 4 side.
[0017]
The weft 14 that connects the two fabric layers 5 and 6 and the weft 15 that regulates the weft 14 are made of a twisted yarn such as a multifilament yarn obtained by twisting long fibers or a spun yarn obtained by spun short fibers. Thereby, the entanglement of the forming fibers of the nonwoven fiber layer 2 is improved, and the displacement of the weft 9 and the weft 11 is further suppressed. Further, it is possible to prevent the non-woven fiber layer portion near the joining loops 3 and 4 from falling off.
[0018]
In the joining loops 3 and 4, a joining core wire 18 is inserted into a common hole formed by alternately engaging these, and the felt is joined endlessly. Due to the effect of the non-weft region of the joining loops 3 and 4 and the non-looped fabric layer 6, the degree of crushability of this joint portion when a compressive force is applied in the pressing step is different from that of the ground portion. The degree can be adjusted to be equal to that of the ground part by the diameter and the number of the joining core wires 18.
[0019]
FIG. 2 is a schematic view showing the procedure of weaving the woven fabric layer with a loop shown in FIG. Here, the first and second warp yarns 7 and 8 on the paper machine are woven as drive yarns on the loom, and the weft 9 on the paper machine is a warp (warping yarn) on the loom, and a loop forming core. The woven fabric layer with the loop is endlessly woven by sack weaving while forming the joining loops 3 and 4 by entanglement of the driving yarn with the material 21. Specifically, the joining loops 3 and 4 are formed on one of the ears 22 and 23 on the loom, and the driving yarns that become the warp yarns 7 and 8 are hooked on the loop forming core 21 at the ears 22 and folded. Thus, the joining loops 3 and 4 are formed. Further, the woven fabric layer 5 with a loop is woven by weaving the weft 15 on both sides of the joining loops 3 and 4.
[0020]
FIG. 3 is a schematic view showing a procedure of weaving of the non-loop fabric layer shown in FIG. 1. Here, the loop-free woven layer 6 is woven in a bag weave in the same manner as the looped woven layer 5, and is woven endlessly so as to form a weft-free region over a required length. The non-looped fabric layer 6 can be woven simultaneously with the looped fabric layer 5 by multiple weaving on a loom.
[0021]
4 and 5 are cross-sectional views showing the steps of manufacturing the felt with paper seam shown in FIG. When the woven fabric layer 5 with loop and the woven fabric layer 6 without loop are woven as described above, first, as shown in FIG. The two fabric layers 5 and 6 are overlapped so as to align with each other, and then, as shown in FIG. 4B, a weft 14 connecting the two fabric layers 5 and 6 is passed through and heated and formed. Then, as shown in FIG. 4C, the nonwoven fiber layer 2 is laminated and integrated on the base fabric 1 by needling.
[0022]
After the endless felt is formed through the above-described steps and various steps usually performed, the endless shape may be finished by a processing method similar to that of a normal felt with a seam. First, the loop forming core material 21 is extracted, and as shown in FIG. 5 (A), the joining loops 3 and 4 engaged with each other are separated and the joining loops 3 and 4 are opened. Then, the nonwoven fiber layer 2 and the non-woven fabric layer 6 are cut along the rows of the joining loops 3 and 4. As a result, as shown in FIG. The end felt thus manufactured is drawn into a felt run of a paper machine, and the joining loops 3 and 4 provided at both ends of the end felt are alternately arranged as shown in FIG. It is engaged and joined endlessly through the joining core wire 18.
[0023]
FIG. 6 is a longitudinal sectional view showing a second embodiment of the felt with paper seam according to the present invention. The base fabric 31 here has a weft 14 for connecting the two fabric layers 5 and 6 and a weft 15 for regulating the weft 14, as in the first embodiment shown in FIG. Unlike the above-described embodiment, one of the wefts 14 that connects the two fabric layers 5 and 6 is disposed closer to the joining loop 3.4 than the weft 15. As a result, the entanglement of the nonwoven fiber layers 2 near the joining loops 3 and 4 becomes stronger, and the bonding force between the two woven layers 5 and 6 via the nonwoven fiber layers 2 is also improved. The risk of separation during use can be reduced. Further, it is possible to prevent the flap portion 17 protruding from one end from falling off for the purpose of suppressing the influence of the joining loops 3 and 4 on the paper forming surface 12.
[0024]
FIG. 7 is a longitudinal sectional view showing a third embodiment of the felt with paper seam according to the present invention. The base cloth 41 here has a weft 14 that connects the two fabric layers 5 and 6 and a weft 15 that regulates the weft 14, as in the second embodiment shown in FIG. Unlike the above-described embodiment, a weft yarn 42 composed of a twist yarn entangled only with the warp 10 of the non-loop woven fabric layer 6 is provided near the non-weft region of the non-loop woven fabric layer 6. Thereby, the entanglement of the forming fibers of the nonwoven fiber layer 2 is improved, and the risk that the woven fabric layer 5 with loop and the woven fabric layer 6 without loop are separated during use can be reduced. The falling off of the nonwoven fiber layer 2 in the vicinity can be suppressed.
[0025]
FIG. 8 is a longitudinal sectional view showing a fourth embodiment of the paper-made seamed felt according to the present invention. The base fabric 51 here has a three-layer structure in which two non-loop fabric layers 53 and 54 are superimposed on a loop fabric layer 52 provided with joining loops 3 and 4, unlike the above embodiments. are doing. The looped fabric layer 52 has the same configuration as the looped fabric layer 5 shown in FIG. 1, and the loopless fabric layers 53 and 54 have the same configuration as the loopless fabric layer 6 and have the same reference numerals. And a detailed description is omitted. In the base fabric 51, the weft yarn 14 is entangled with each of the fabric layers 52, 53 and 54 near the joining loops 3 and 4, and these are connected to each other. In addition, it is also possible to employ a double-woven fabric for the loop-free fabric layer. In this case, the weft 14 may be entangled with two warps of the non-looped fabric layer and one warp of the looped fabric layer as in FIG.
[0026]
The length of the non-weft region in the length direction may be appropriately set according to the size of the joining loop. For example, if the inner diameter of the joining loop is about 0.7 mm to 1.3 mm, the length is about 2 mm. Just do it.
[0027]
Further, the structure of the weft 14 entangled with both of the fabric layers is not particularly limited, and the weft does not fall off from the cut end of the warp in the weft-free region of the non-loop fabric layer, and has an end shape. Any form can be adopted as long as the joining loop row and the non-weft region can be aligned so that the weft is not cut during the finishing.
[0028]
【The invention's effect】
As described above, according to the present invention, a papermaking seamed felt having a base fabric having a structure in which a woven fabric layer provided with a joining loop is superposed on a woven fabric layer which is woven independently and endlessly. By cutting the non-loop fabric layer in the non-weft region, the weft is not cut obliquely on the way, and is entangled with the warp of the looped fabric layer at the cut end of the warp of the loop-free fabric layer. By arranging the weft, it is possible to avoid the inconvenience that the weft is released from the cut end of the warp due to an external force during traveling, and a great effect is obtained in stably producing a high quality product.
[Brief description of the drawings]
FIG. 1 is a longitudinal sectional view showing a first embodiment of a felt with paper seam according to the present invention.
FIG. 2 is a schematic view showing a procedure of weaving of the woven fabric layer with a loop shown in FIG. 1;
FIG. 3 is a schematic view showing a procedure of weaving of the non-loop fabric layer shown in FIG. 1;
FIG. 4 is a cross-sectional view showing a manufacturing process of the felt with paper seam shown in FIG.
FIG. 5 is a cross-sectional view showing a manufacturing step following FIG. 4;
FIG. 6 is a longitudinal sectional view showing a second embodiment of the felt with paper seam according to the present invention.
FIG. 7 is a longitudinal sectional view showing a third embodiment of a felt with paper seam according to the present invention.
FIG. 8 is a longitudinal sectional view showing a fourth embodiment of the felt with paper seam according to the present invention.
[Explanation of symbols]
1.31, 41, 51 Base cloth 2 Non-woven fiber layer 3.4 Bonding loop 5.52 Fabric layer with loop 6, 53, 54 Fabric layer without loop 7.8 Warp 9 Weft 10 Warp 11 Weft 12 Paper forming surface 14 Weft 15 Weft 17 Flap portion 18 Joining core wire 21 Core material 22/23 for loop formation Ear 42 Weft

Claims (6)

A base fabric having a structure in which a loop-free woven layer that is woven endlessly independently from the loop-attached woven layer provided with a joining loop is overlapped,
The non-loop fabric layer is cut in the width direction along the rows of the joining loops when finishing the felt into an end shape, and the cut portion has a weft entangled only with the warp of the non-loop fabric layer. Felt with a seam, characterized in that a non-weft area without a thread is formed. At the same time as having a weft intertwined with the warp of the loop-free woven layer in the vicinity of the joining loop in the looped woven layer, and at both sides of the weft-free region of the non-loop woven layer in the loop-free woven layer. The felt with seam according to claim 1. In the vicinity of the non-weft region in the loop-free woven layer, the weft entangled only with the warp of the loop-free woven layer is similarly formed of the non-woven fiber layer from the weft of the ground portion constituting the loop-free woven layer. The seamed felt according to claim 1, wherein the felt is formed of a thread with good entanglement. In the vicinity of the joining loop in the looped woven fabric layer, the weft entangled only with the warp of the looped woven fabric layer is similarly entangled with the forming fiber of the nonwoven fiber layer from the weft of the ground portion constituting the looped woven fabric layer. The felt with seam according to any one of claims 1 to 3, wherein the felt is formed of a good thread. The seamed felt according to any one of claims 1 to 4, comprising a plurality of the non-loop fabric layers. A step of weaving the woven fabric layer with loops endlessly while entangled the driving yarn with the loop forming core material to form a joining loop,
Endlessly weaving the loop-free woven layer so that a weft-free endless weft region is formed over the required length,
A step of fabricating a base fabric by superimposing the looped woven layer and the loopless woven layer in correspondence with the non-weft region to the joining loop,
A step of laminating and integrating a nonwoven fiber layer on the base fabric,
Extracting the loop-forming core material and cutting the non-woven fiber layer and the non-loop woven layer along the rows of the joining loops to finish it into an end shape. Production method.

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